Smith



s. B. SMITH & P. P. LANE.

SAWMILL.-

PATENTBD DEC. 7, 1858.

2 SHEETSSHEET 1.

SAML. B. SMITH AND PHILANDER'P. LANE, OF CINCINNATI, OHIO, ASSIGNORS TOLANE AND BODLE'Y, OF SAME PLACE.

SAWMILL.

Specification of'Iietters Patent No. 22,268, dated December 7, 1858.

To all whom it may concern? Be it known that we, SAMUEL R. SMITH andPHILANDER 1?. LANE, both of Cincinnati, Hamilton county, Ohio haveinvented new and useful Improvements in Sawmills; and we hereby declarethe following to be a full and ex'actdescription of the same, referencebeing had'to the accompanyingdrawings, makingpart of this specification.

This invention relates chiefly to the class known as portable sawmills,its objects being to increase the compactness and efficiency ofsuchmachines and t-he facility of manipulating them.

The improvements consist 1st in an arrangement of setting 7 mechanismwhich admits of the head blocks being placed in effective communicationwith the setting lever, at any distance asunder without disconnection ofparts; 2nd in an improved arrangement of devices for restraining andregulating the lateral play of'a circular saw; 3d in means forpreventing the clogging" of certain parts of the" machinery withsawdust.

In the accompanying drawings, Figure 1, is a perspective view of amill'embodying our improvements. Fig. 2, is a vertical section of one ofthe knees and its. accessories at X X Fig. 1. Fig.3, is a verticalsection coincident with the axis of the saw. Fig; 4 is vertical sectionat Y Y Fig. 1; Fig; 5, is a diagram representing the relative positionand operation of certain parts hereinafter described. Fig. 6 is adetached view of the setting lever and tof; the index.

A, represents a suitable-frame.

B is a circular saw whose arborC is so supported in suitablej'ouinal'bearings D D as to be capable of end play. Attached to thearbor C are the driving pulley E, a pulley u, and "a suit ofdifierential "pulleys F.

The lateral movement of the saw isre'gulated by means of the followingdevices: G is a fast-collar on the arbor G, at or near its midlength.The collar G rests in a box H, which box is supported in a bracketorpedestal I attached-"to the frame. J are temper screws which passthrough lugs K, projecting from the pedestal l. L, are springs of india:rubber or other suitable material confined between the box and temperscrews and'serving in conjunction with-the screws J, to regulate theposition and play of the box.

Mare the timbers of the carriage running on ways U. The feed and giggingback movements of the carriage are communicated from the arbor C asfollows: R P'QgO are respectively a 'rack, pinion, shaft and pulley ofusual construction. A standard S, rising from the frame A, hasprojecting horizontally from it, a wrist- T, forming the axle of arocking arm V. V is another standard which afi'ords journalbearingpermitting the combinedrotary and vibratory motion of a'shaftlV, theother end of said shaft being journaled in one end of the rocking. armU. The shaft V carries a small friction pulley X and a suit ofdifferential pulleys Y, corresponding-with those on the arbor O. Theother end of the rocking: arm U carries a small friction pulley Z whichwhen depressed communicates motion from the pulley a to the pulley O. aZ) 0 (Z is an arrangementof lever and toggle, connectedto the rockingarm U and enabling the operator to place it in either desired position.

The logis set or fed laterally toward the saw by means of the followingdevices: 0 e are head blocks extending transversely across the timbers Mof the" carriage, and forming support and attachment for the knees fand'their accessories. g are elevated Ways, forming on their upper surface asupport for the log, and serving to confine the knees to a rectilinearpath toward and from the saw. It are ratchet racks, perforated to permitthe escape of saw dust and having a short longitudinal reciprocatingmotion imparted'to them simultaneously. For this purpose each of theracks h, is furnished with a short accessory rack i, which gears with apinion j, concentrically attached to a' segment wheelin which gears intoalong rackbar l, extending'from end end ofthecasing. The bar Z, isoperated by means of a lever m, whose lower end is pivoted to thesaidbar. a, is a segmental guide bar in which the upper part of" the leverm, works. 0, 0, are stops which being adjusted to any required distanceasunder, limit the motion of the lever m, to the required extentytoimpart the desired lateral feed motion or set to the log. The knees arecast with solid heavy bases which are in close proximity to the racksit, and have sufiicient substance to hold within vertical slots a set ofdrops q, having free vertical play, and so arranged as to comesuccessively into action in customary manner. 2, 2, are lugs projectinglaterally from the drops 9, to enable their simultaneous elevation ashereinafter explained. p are a suit of detaining pawls attached to eachknee and engaging in an auxiliary rack T, on the head block 6. The pawls79, are constructed with elevated heels (1) for the purpose hereinafterexplained. s, is a lever of peculiar construction pivoted to each kneef, in the manner shown. The lever s, has two short arms 6, 7, projectingfrom opposite sides of it, to one of which (6), a feed hand 6, ishinged. The arm '2, elevates the pawls p, by impinging upon their heels1, when the lever s, is moved in that direction. 1), is a bar hinged atone end to the knee 7', and furnished with a lug 3, projecting laterallyover the arm 6, of the lever s, so as to be elevated by the motion ofthe latter, which results in the simultaneous elevation of the drops g,by means of the bar a, engaging under the lugs 2. W, is raised scale onthe head blocks 6 which in conjunction with a graduated index 2 on theknee accurately inclicates the motion of the latter. 8, are sockets inthe knees to receive the shanks of dogs of any customary construction.

The small friction pulley X, we have found to be the most eflective whenconstructed of small disks of leather clamped together. The otherfriction pulleys are of yellow pine of several thicknesses cross grainedand glued and screwedtogether.

The operation is as follows: The carriage being run back to a properdistance, a log is placed in position upon the ways 9, of the headblocks, the knees separately moved up to it by means of the levers s',and the log confined by dogs in the usual manner. The lever d, beingthen drawn toward the operator in the position shown in the strong linesin the drawings, the feed or forward motion is communicated from the sawarbor through the medium of the differential pulleys F and Y, band tshaft W friction pulley X pulley O shaft 2 pinion P and rack R tothecarriage M. The out being completed the lever a, is reversed so as tobring the small friction pulley Z, in contact with the pulley on thearbor and with the pulley 0, so as to impart a rapid reverse motion tothe carriage, until the log clears the saw, when the lever is suddenlyplaced in its former position and the opposing friction of the forwardmotion effects the instantaneous checking of the carriage in therequired position. The lever a, is then placed in its middle position soas to leave the carriage at rest and the stops, 0, 0 being set therequired distance apart the lever m, is drawn toward the operator tillarrested by the stop 0, thereby retracting the racks it. A forwardmotion of the lever m, against the stop 0' by advancing the racks itsets the knees forward the required distance which is accuratelyindicated by the scale W and index Z. The electric cushions L, whilepermitting the lateral play of the saw, prevent its undue departure andrestores it to its normal plane. By adjusting one or both of the temperscrews the saw and the arbor may be set bodily out or in or may beallowed a greater or less range of lateral play. Or the temper screwsmay be made to compress the cushions to such an extent as to render thesaw practically speaking rigid and immovable or the cushions may bereadily taken out and the temper screws set in so as to render the sawabsolutely immovable, a condition which is frequently found desirable.The box H and collar G are placed at such distance behind the frontbearing as to hold the arbor firmly against springing and to avoidheating the central portion of the saw.

The feed and gigging back mechanism here described avoids the use ofshifting or slack belts and clutches of every description and is promptand effective in arresting and reversing the rapid motion imparted tothe carriage and log in gigging back. Its arrangement is also remarkablysimple and compact; qualities of great importance in portable saw mills.By this arrangement also the operator is enabled to ease the feed andthus humor the saw by simply graduating the pressure exerted on thelever when a portion of the log is approaching which by reason of a knotor otherwise would be liable to turn the blade of the saw. Thesemovements are effected without any sudden strain or jar of the machineryand have proved of signal value in the working of several machineslately built on our plan. By our method the head blocks or knees may beplaced in communication with the setting lever at any distance asunderto accommodate logs of different lengths, and operated separately orsimultaneously, without in either case any disconnection of parts.

e claim as new and of our invention herein:

1. The longitudinal rack bar Z, combined as described with the segmentwheel 70, pinion j, and accessory rack 2', so as to admit of the headblocks being placed in gear at any required distance asunder withoutdisconnection or adjustment of parts.

2. The described arrangement of the collar Gr, box H, cushions L, andtemperscrews J, whereby the saw may be fixed rigidly in any position orallowed lateral play to any I In testimony of which invention Weheredesired extent and retpprned autompticallykto 1 unto set our hands.its normal plane W en release and y means of which the position of thesaid nori g gl gi SMITH 111al plane may be varied at pleasure. l 3. Theperforations 5, applied to the transl Attest: verse racks p, in themanner and for the pur- GEO. H. KNIGHT, pose explained. l C. STEEMER.

